JP5688531B2 - Head fixing device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a head fixing device used for a dental X-ray imaging apparatus and the like, and in particular, a head X intended to ensure standardity and reproducibility mainly for X-ray imaging in a dental region. The present invention relates to a head fixing device for X-ray photography or photography for use in a head-standard photography apparatus as well as a line-standard photography apparatus for safe and suitable photography.

  In orthodontic treatment and oral surgery, head X-ray standard imaging (cephalometric X-ray imaging) is indispensable for analyzing the symmetry and occlusal state of the face. Alternatively, a head-standard photography apparatus may be used to take a photograph of the appearance of the subject before, during, and after surgery. In these imaging | photography, the imaging device with reproducibility is used in order to perform a treatment plan and follow-up observation of the same subject. In such a device, an X-ray head fixing device that fixes the head of the subject is used.

  The head fixing device for X-ray imaging is used for dental panoramic tomography, tomography, CT imaging, head standard photography, and the like in addition to cephalo X-ray imaging. In recent years, these photographing apparatuses are used not only as individual devices but also as dual-purpose devices, which are combined-type devices having some or all of the functions of these devices.

  The head fixing device used in these imaging devices is one in which ear rods (earlobe) are inserted into the left and right outer ear holes of the subject in order to reliably position and fix the subject's head. Many are used. For example, a head fixing device for X-ray imaging that fixes a subject's head to an arbitrary posture suitable for an imaging region or the like with good operability has been proposed (see Patent Document 1) (Patent Document 2). reference).

  FIG. 16 is a side view schematically showing a typical head fixing device 101. The head fixing device 101 generally includes a pair of left and right side head pressing members 102, a chin rest 103, and guide means 104. In the head fixing device 101, a subject places a head between the side head pressing members 102 in a state where a pair of side head pressing members (ear rod arms) 102 are separated from each other. The part pressing members 102 are brought close to each other, and the protruding ear rods 105 respectively provided on the free end parts 102a are fitted into the outer ear holes to position the subject. In this state, the main body of the chin rest 103 is moved in the direction of the arrow 106 so that the lower jaw of the subject is placed on the placement portion 103 a of the chin rest 103, and is moved in the direction of the arrow 107 by the guide means 104. If it is important to ensure standardity and reproducibility, a pad that pushes the subject's eyebrows (nadion) or forehead is provided and fixed at three points: ear rod, chin rest, and pad. There are many cases.

  In this way, after positioning the lower jaw and fixing the subject, cephalometric imaging, panoramic imaging, or tomographic imaging is performed.

  By the way, as shown in FIGS. 17 and 18, the ear rod fitted in the outer ear hole of the subject sandwiched the core material 120 made of a foaming agent with a carbon fiber reinforced plastic plate 121 having high X-ray permeability. An ear rod 105 made of a transparent synthetic resin such as methacryl is bonded and fixed to the free end portion 102a of the ear rod arm. Patent Document 2 discloses a head in which an ear rod arm is made of a transparent synthetic resin such as methacryl, and an ear rod formed of a transparent synthetic resin such as methacryl is bonded to the free end thereof. Fixing devices have been proposed.

JP 7-275239 A JP 2006-116051 A

  Since the above-described ear rod is fitted into the outer ear hole of the subject, it is desired to disinfect each time the subject changes. However, since the ear rod is bonded and fixed to the ear rod arm, there is only a method such as wiping with alcohol to disinfect, and there is a problem that it takes time to disinfect every corner.

  On the other hand, there is a type in which a cover made of rubber or the like is attached to the ear rod. However, the cover is discarded for each subject, and waste is increased, which is not preferable.

  The present invention has been made to solve the above-described conventional problems, and can easily disinfect ear rods used for a subject, and has high standardity, which eliminates wasteful disposal. The purpose is to provide.

The head fixing device according to the present invention includes a pair of support arms provided so as to be able to approach and separate from both side heads of a subject, a rod base fixed to the free end of the support arm, and the rod base. An ear rod that is detachably attached to the subject's outer ear hole, and the ear rod side of the rod base has a flange portion that tapers toward the ear rod side, and the ear The base portion of the rod is formed with a tapered portion that engages with the flange portion.

  Furthermore, the ear rod may be formed of a material that can be boiled and disinfected.

  In the present invention, since the ear rod is detachably attached to the support arm, the ear rod can be removed and disinfection can be easily performed.

  For example, by attaching an ear rod sterilized by boiling sterilization or the like to the support arm, a clean ear rod sterilized for the subject can be inserted into the outer ear hole, which is excellent in terms of hygiene.

  Moreover, after use, if the ear rod is removed from the support arm and then boiled and disinfected, etc., it can be reused without being discarded, which is economical.

  In addition, the ear rod is configured to drop off from the support arm when a load of about 1 kg is applied during use, so even if a sudden case occurs, the ear rod will come off and There is no damage.

1 is a front view showing an entire embodiment of an X-ray panorama / CT imaging apparatus having a head fixing device according to the present invention. 1 is a side view showing an entire embodiment of an X-ray panorama / CT imaging apparatus having a head fixing device according to the present invention. 1 is a plan view showing the entire embodiment of an X-ray panorama / CT imaging apparatus having a head fixing device according to the present invention. It is a front view which shows the head fixing device for cefaro imaging | photography using the ear rod concerning this invention. It is a side view which shows the head fixing apparatus for cephalo imaging using the ear rod concerning this invention. It is sectional drawing which shows the ear rod part which concerns on 1st Embodiment of this invention. It is a top view which shows the ear rod part which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the state from which an ear rod remove | deviates from the ear rod part which concerns on 1st Embodiment of this invention. It is a top view which shows the head fixing device for panoramic imaging using the ear rod concerning this invention. It is a side view which shows the head fixing device for panoramic photography using the ear rod concerning this invention. It is sectional drawing which shows the ear rod part which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the ear rod part which concerns on 3rd Embodiment of this invention. It is sectional drawing which shows the ear rod part which concerns on 4th Embodiment of this invention. It is a top view of the head standard photography apparatus using the ear rod concerning this invention. It is a side view of the head standard photography apparatus using the ear rod concerning this invention. It is a side view which shows the conventional head fixing device typically. It is sectional drawing which shows the ear rod part used for the conventional head fixing device. It is a top view which shows the ear rod part used for the conventional head fixing device.

  An X-ray imaging apparatus that performs X-ray imaging using a head fixing device will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated in order to avoid duplication of description.

  The X-ray imaging apparatus shown in FIGS. 1 to 3 is an example of an FPD / CCD combined X-ray panorama / CT imaging apparatus that uses both cone beam X-rays having a head fixing device and strip-shaped panoramic X-rays. Is shown. The head fixing device of the present invention is not limited to the dual-purpose device, but is standardized and reproduced such as devices used for Cephalo X-ray photography, dental panoramic tomography, tomography, CT photography, head standard photography equipment, etc. It can be applied to all highly functional devices.

  As shown in FIGS. 1 to 3, this apparatus uses an FPD (Flat Panel Photodetector) type sensor 4 and a strip-shaped CCD sensor (not shown) in combination, and the FPD type sensor 4 mainly uses a CT apparatus. This is a panorama / cephalo / CT combined device that performs panoramic photography and cephalometric photography with a strip-shaped CCD sensor.

  As shown in FIGS. 2 and 3, the cephalo imaging means 8 is provided at the end of the arm 50 extending in the horizontal direction from the vertical sliding portion 5 attached to the support column 6. The panoramic / cephalo combined X-ray imaging apparatus which is mounted on the cephalometric imaging means 8 side and performs cephalometric imaging at a magnification of 1.1 times uses a strip-shaped CCD sensor as a standard, as well as an FPD type as an apparatus selection. It is also possible to shorten the shooting time by using a large sensor.

  Although not shown in FIGS. 1 to 3, a signal from the sensor is given to a computer device for photographing such as a personal computer (PC) through a cable, imaged by the computer device, and displayed on the display device. An X-ray image is displayed on the screen.

  This apparatus positions and fixes a subject's head on a panoramic imaging head fixing device 1 provided on the panoramic imaging apparatus side, and a single strip-shaped CCD sensor 4 disposed opposite to a turning arm 2. Then, using the X-ray generator 3, the revolving arm 2 performs a panoramic image by performing a revolving motion for the panoramic image. The sensor unit 4 is removed from the panoramic imaging side and attached to the CT imaging or cephalometric imaging means 8 side provided at the end of the arm 50 extending in the horizontal direction from the vertical sliding unit 5. Then, the head of the subject is positioned and fixed on the X-ray imaging head fixing device 9 used for cephalometric imaging, and cephalometric imaging at an enlargement ratio of 1.1 is performed.

  The ear rod portion 9a is commonly used for a head fixing device 9 that uses standardization and reproducibility for cephalometric imaging. In the case of panoramic photography, depending on the photographing mode, the ear rod unit 1a is used for photographing such as temporomandibular joint 2-division photography and temporomandibular joint 4-division photography that require standardization for positioning of the subject's head. The head fixing device 1 for panoramic photographing is used with the person's head stably and with standardity as necessary.

  As will be described later, the ear rod portion 1a and the ear rod portion 9a provided in the panoramic head fixing device 1 and the cephalo imaging head fixing device 9, respectively, are provided in the outer ear hole of the subject. The ear rods 14 and 94 to be fitted are detachably mounted from the ear rod portions 1a and 9a. Further, when the head rods are fixed to the ear rods 14 and 94, the ear rods 14 and 94 do not come off in a predetermined load state. It is comprised so that it may drop | omit from the ear rod parts 1a and 9a.

  The X-ray imaging head fixing devices 1 and 9 will be described with reference to FIGS. First, the head fixing device 9 for cephalometric imaging will be described with reference to FIGS.

  FIG. 4 is a front view showing a head fixing device for cephalometric photography using the ear rod according to the present invention, and FIG. 5 is a side view thereof.

  As shown in FIGS. 4 and 5, a cephalometric imaging means 8 is provided at the end of an arm 50 extending in the horizontal direction from the vertical sliding part 5 on the panorama / CT imaging apparatus side. A head fixing device 9 is provided for positioning and fixing the head of the subject stably and with standardity.

  When the imaging mode is selected at the time of cephalometric imaging, the position necessary for the cephalometric imaging such as the horizontal rotation angle of the X-ray generator 30 and the like in the position of the front and rear of the arm in the positional relationship set in advance for the cephalometric imaging. The relationship is set automatically.

The left and right ear rod portions 9a provided in the head fixing device 9 are openable and closable, that is, attached to the heads on both sides of the subject so as to be close to and away from each other, and the X-ray generator 30 and the left and right ears are attached. Rotate at least 90 degrees so that a normal image and a side image of a normal subject can be photographed around a vertical line orthogonal to a straight line connecting the centers of the rod portions 9a (intersection of both outer ear canal and midline of subject O) It is configured to be able to. In addition, the photographing at this time is configured so as to be able to perform a cephalo photographing with an enlargement ratio of 1.1 times.

  4 and 5, the above-described ear rod portion 9 a includes a pair of support arms 90 and an ear rod 94 that can be opened and closed symmetrically with respect to the mid-portion of the subject O. As shown in FIG. 6, the ear rod 94 is detachably mounted on a rod base 92 that is inserted into a support arm 90 and fixed by adhesion. The support arm 90 is configured by sandwiching a core material 90a made of a foaming agent between carbon fiber reinforced plastic plates 90b having high X-ray permeability, and is formed on the free end portion of the support arm 90 with a transparent synthetic resin such as methacryl. The rod base 92 is bonded and fixed.

  The ear rod side of the rod base 92 is provided with a flange portion 93 that expands in a tapered shape toward the tip end side of the ear rod. The base portion of the ear rod 94 is formed in a tapered shape so as to engage with the flange portion 93. The material of the ear rod 94 is generally a general-purpose engineering plastic, such as polysulfone, polycarbonate, polyamide, polyacetal, polybutylene terephthalate, polyethylene terephthalate, or the like.

  When the ear rod 94 is attached to the rod base 92, both engage with each other so as to have a strength sufficient to restrict the movement of the subject. However, when a load of a certain level or more, for example, a load of about 1 kg, is applied to the ear rod 94, the engagement between the rod base 92 and the ear rod 94 is disengaged as shown in FIG. Can be dropped or removed. If the above-mentioned general-purpose engineering plastic is used as the material of the ear rod 94, the ear rod 94 can be removed and boiled and disinfected.

  By mounting the ear rod 94 sterilized by boiling sterilization or the like on the ear rod portion 9a, a clean ear rod 94 sterilized for the subject is inserted into the outer ear hole.

  Further, after use, if the ear rod 94 is removed from the ear rod portion 9a and then boiled and disinfected, it can be reused without being discarded, which is economical.

  Furthermore, the ear rod 94 is configured to drop off from the ear rod portion 9a when a load of about 1 kg is applied during use. For this reason, even when a sudden case occurs, the ear rod 94 is detached, so that it is possible to escape from the head fixing device 9 at the subject's will and damage the subject. Absent.

  Note that the left and right ear rods 9a provided in the head fixing device 9 so as to be freely opened and closed have markers 96 such as titanium spheres at the distal ends of the left and right ear rods 94 so as to be a reference in the case of a cephalometric image. Is provided.

  Next, the head fixing device 1 for panoramic photography will be described with reference to FIGS.

As shown in FIGS. 9 and 10, the base unit 20 is inserted into the outer ear hole of the subject (patient) in order to position the subject stably with standardity and reproducibility. An opening / closing means (not shown) provided so as to be freely opened and closed is provided with an ear rod part 1 a provided detachably and a knob handle 21 for opening and closing the ear rod part 1 a. In addition, the chin rest 22 for the subject is provided on the base 20 so as to be slidable up and down, and only a part of the rest is shown, but the base 20 can be attached to and detached from the base 20 as necessary. The support means 23 for supporting the frontal portion of the subject or the eyebrows (nadion), the subject handle 24, the electrical operation unit 27 necessary for positioning the subject, and panoramic imaging An aiming laser beam 28a for instructing the reference position of the front tooth portion, a laser beam 28 for instructing the midline of the subject, and a temporal pressing 29 of the subject are provided.

  The above-described ear rod portion 1a is composed of a pair of support arms 10 and an ear rod 14 that can be opened and closed symmetrically with respect to the midline portion of the subject. As shown in FIG. 11, the ear rod 14 is detachably mounted on a rod base 12 that is inserted into the support arm 10 and bonded and fixed. The support arm 10 is configured by sandwiching a core material 10a made of a foaming agent between carbon fiber reinforced plastics 10b having high X-ray permeability, and is formed of a transparent synthetic resin such as methacryl at the free end portion of the support arm 10. The rod base 12 is bonded and fixed.

  As described above, the ear rod side of the rod base 12 is provided with a flange portion 13 that expands in a tapered shape toward the ear rod side. The base portion of the ear rod 14 is formed in a tapered shape so as to engage with the flange portion 13. The material of the ear rod 14 is the same as described above.

  When the ear rod 14 is attached to the rod base 12, both engage with each other so as to have a strength sufficient to restrict the movement of the subject. However, when a load of a certain level or more, for example, a load of about 1 kg, is applied to the ear rod 14, the rod base 12 and the ear rod 14 are disengaged, and the ear rod 14 can be dropped or removed from the rod base 12. If these general-purpose engineering plastics are used, the ear rod 14 can be removed and the boiling disinfection can be easily performed.

  By attaching the ear rod 14 sterilized by boiling sterilization or the like to the ear rod portion 1a, a clean ear rod 14 sterilized for the subject is inserted into the outer ear hole.

  Moreover, if it removes from the ear-rod part 1a after use and performs boil sterilization after that, it can reuse without discarding and it is economical.

  In use, the ear rod 14 is configured to drop off from the ear rod portion 1a when a load of about 1 kg is applied. For this reason, even when a sudden case occurs, the ear rod 14 is detached, so that the subject can escape from the head fixing device without causing any damage to the subject. .

  In addition, the left and right ear rod portions 1a provided on the head fixing device 1 of a CT imaging apparatus using a large FPD type sensor (not shown) that can be opened and closed are used as a reference when reconstructing a Cephalo image by the Latham method. Therefore, markers 16 such as titanium spheres are provided at the tip portions of the left and right ear rods 14.

  FIG. 12 is a sectional view showing an ear rod according to a third embodiment of the present invention. In the embodiment shown in FIG. 12, the flange portion 93a of the rod base 92 is not tapered and has a flange shape with the same diameter. A groove is provided in the vicinity of the tip of the flange portion 93a, and a ring 93b having a large friction coefficient such as rubber is attached to the groove. The ring 93b prevents the ear rod 94 from falling off until a predetermined load is applied without providing a taper to the flange portion 93a.

    FIG. 13 is a sectional view showing an ear rod according to a fourth embodiment of the present invention. In the embodiment shown in FIG. 13, the flange portion 93 c of the rod base 92 is not tapered but has a flange shape with the same diameter. Then, after the ear rod 94 is inserted into the flange, the ear rod 94 is pressed against the flange portion 93c by the ring 93d, and the ring 93d prevents the ear rod 94 from falling off until a predetermined load is applied.

  In order to make it easy to attach the ear rod to the flange, a slit or the like may be provided to give elasticity to the ear rod.

  FIG. 14 is a plan view of a head standard photography apparatus 40 in which the head fixing device of the present invention is used, and FIG. 15 is a side view thereof.

  As shown in FIGS. 14 and 15, this device 40 is provided with a head fixing device 41 on the upper part of a chair 42 on which the subject sits in order to take a head normalized photograph of the subject. Yes. In the head fixing device 41, ear rods 94 'are detachably mounted on a pair of left and right support arms 90' that are attached to the subject's head so as to be openable and closable. That is, the rod base 92 'is bonded and fixed to the free end portion of the support arm 90', and the ear rod 94 'is detachably attached to the rod base 92'. The support arm 90 ', the rod base 92', and the ear rod 94 'are configured in the same manner as the structure shown in FIG. 6, FIG. 12, or FIG. When the head is fixed, the ear rod 94 ′ does not come off in a predetermined load state. When a load of a certain level or more, for example, a load of about 1 Kg is applied to the ear rod 94 ′, the ear rod 94 ′ It is configured to drop off.

  As described above, in the head-standard photography apparatus 40, the left and right support arms 90 ′ and the ear rod 94 ′ are provided in the same configuration as described above, so that the standardity is maintained and the safety is further improved. The operability can be improved.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims for patent.

DESCRIPTION OF SYMBOLS 1, 9, 41 Head fixing device 1a, 9a, Ear rod part 10, 90, 90 'Support arm 12, 92, 92' Rod base 13, 93 Flange part 14, 94, 94 'Ear rod

Claims (2)

A pair of support arms provided to be close to and away from the heads on both sides of the subject,
Rod bases respectively fixed to the free ends of the support arms;
An ear rod that is detachably attached to the rod base and inserted into the outer ear hole of the subject, and
The rod base has an ear rod side having a flange portion that tapers toward the ear rod side, and a base portion of the ear rod is formed with a taper portion that engages with the flange portion. apparatus. The head fixing device according to claim 1, wherein the ear rod is formed of a material that can be boiled and disinfected.

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